heereshoff



3 Sheets-Sheet 1 J. B. P. HERRES'HOFF.

ROASTING FURNACE.

(No Model.)

Patented Mar. 24, 1896.

u :INVENTOR A TTORNEYS.

3 Sheets-Sheet 2.

{No Model.)

J. B. F. HERRESHOPF.

BOASTING FURNAGE.

No. 556,750. Pqtented Mar. 24, 1896.

WITNESSES:

manna [GIMAMJKUTDUTHQIA (No Model.) 3 Sheets-Sheet 3.

J. B. P. HERRESHOPF. ROASTING FURNACE.

No. 556,750. Patented Mar. 24, 1896.

WITNESSES:

INVENTOH BY 6; M

A I'TOHNEYS.

UNITED STATES PATENT EEicE.

JOHN B. FRANCIS IIERRESIIOFF, OF BROOKLYN, ASSIGNOR TO THE NICHOLS CHEMICAL COMPANY, OF NEIV YORK, N. Y.

ROASTlNG-FURNACE.

SPECIFICATION forming part of Letters Patent No. 556,750, dated March 24, 1896.

Ap licati fil d March 29,1895. Serial No. 543,628. (No model.)

To alt whom, it may concern: the other. These roasting-floors are differ- Be it known that I, JOHN B. FRANCIS ently constructed, according to the location HERRESHOFF, a resident of Brooklyn, Kings of their exit-passages. The floors E are concounty, State of New York, have invented cerstructed of tiles e which are provided with 5 5 tain new and useful Improvements in Roastprojections 6'. These tiles 6 have their proing-Furnaces, of which the following is a jections 6 built into the wall A of the furspecitication. naee, as shown at c and bear against a key- H y invention relates to a roasting-furnace stone 6 placed in the center of the furnace. of the type commonly employed for roasting There is a space or passage e formed. by the 60 lo ores, &c.; and it consists in the construction walls of the furnace and the edges of the and arrangement of parts hereinafterset forth tiles 6. The floors or trays E are constructed and claimed. from the tiles (Z. (Shown in Fig. 6.) These In the drawings, Figure 1 represents a vertiles d have their edges built into the wall A of tical central transverse section through a the furnace, as shown at d, and bear against 6 5 roasting-furnace embodying my invention. an annular keystone (Z at the center of the Fig. 2 is a plan view of the floor thereof, the furnace. This annular keystone forms a paswalls of the furnace being in section, the secsage d at the center of the furnace. It will tion being taken on line 2 f Fig. 1. Fig. thus be observed that the several floors or 3 is a plan View of a tile forming part of the roasting-trays are in communication, the pas- 7o 20 trays, and Fig. iis a section thereof on line sages for such communication being at the i of Fig. Fig. 5 is a centerpiece or keyedges of the floors E and at the centers of the stone for the tile-tray hereinafter referred to, floors E. of which the tile shown in Fig. 3 forms a part. Openings F are provided in the wall of the Fig. (i is a plan view of another form of tile furnace opposite each of the several floors or for constructing another form of tray. Fig. trays. These openings are suit-ably closed or 7 is a section thereof on line 7 '7 of Fig. 6. covered during operation of the furnace, but Fig. 8 is a view of a keystone for the tile may be opened at any time to admit of the arch or tray constructed of the species of tile ready removal or insertion of a stirrer-arm. shown in Figs. 6 and 7. Fig. 9 is a plan view The lowermost floor of the furnace is provided c of a stirrer, showing the details of the stirrerwith exit-pipes a, which are pierced laterally arms in dotted lines. Fig. 10 is a side view through the walls of the furnace, and with thereof, partly in section, the section being draw off pipes 19, which open downwardly. taken through the hub of the stirre and serv- In the center of the furnace is a shaft G, ing to exhibit the detailed construction and which is suitably .drivenas, for instance, 5 connection of a stirrer-arm with the hub. by means of bevel-gears II-from a suitable Fig. ll is a section on line 11 11 of Fig. 10, source of power. The shaft G is preferably looking in the direction of the arrow. hollow with apertures g near its lowest portion My invention has special reference to the for its cooling-liquid, be the same water or detailed improvement of roasting-furnaces, air. The shaft is also provided with a suit- 0 0 which improvements are directed mainly to able fluid-sealed bearing I. Secured to the the attachment of the stirrer-arms to their shaft at intervals corresponding to the loca' hub and the construction of the trays or tion of the several roasting floors or trays are roasting-floors, all of which will be pointed hubs J, consisting preferablyof two sections out in the claims. which embrace the shaft and are held together 9 5 In the drawings, A represents the wall of by suitable bolts 3' Each of these sections is the roasting-furnace, which furnace is prefprovided with two cheeksj f, from which proorabl y cylindrical. j ect inwardly lipsj j, which. have knife-ed 13 is the roof of the f urnace,which is pierced for the arm to rest upon, as shown in Fig. 10. for the reception of an exit-pipe G. Each of the sections is also provided with an I00 50 D the floor of the furnace, and E E are overhanging 'l'langej which is shouldered or trays or roasting-floors superposed one above recessed, as at 7".

K K are stirrer-arms, each of which is provided with a pair of pins j and an upwardlyprojeeting toe j? These arms are adapted for engagement with the sections of the hub J, as will be hereinafter described, and are provided with beveled teeth 7t". The teeth on the arms K and K, which constitute a pair mounted upon a single hub, break joints that is, they are so arranged that their paths will be staggered that is to say, when the shaft with its stirrer-arms is rotated, the stirrer-arm K following the stirrer-arm K will have its teeth 7c so arranged as to traverse the ridges which were left by the preceding stirrer-arms, so that the material on the trays of the furnace will be very efficiently stirred.

The manner of inserting the stirrer-arms into the hub is as follows: The arm is tilted and its pins j rest upon the lips j, which form a fulcrum for the stirrer-arms. The upwardly-projecting toe of the stirrer-arm is then in proper position to be entered into the recess j of the hub, whereupon the stirrerarm is lowered to a horizontal position and the toe f entered into the recess j of the hub. The stirrer-arm will now be held firmly in position by its own weight. It will be quite obvious that the stirrer-arms will stir or turn over the material placed upon the roasting floors or trays, the shaft carrying the stirrerarms being rotated for this purpose.

Coming nowto the main utility of myinvention, it will be observed that the openings F are so positioned as to allow of the insertion or withdrawal therethrough of the stirrerarms. These stirrer-arms have hitherto been rigidly connected to the shaft, and in order to remove the same it was heretofore necessary to stop the entire operation of the furnace and to allow it to 0001 before the workman could get at the fastenings; but by my invention in order to remove the stirrer-arms it is only necessary to stop the rotation of the shaft and bring the desired stirrer-arm into position in line with the opening, when the stirrer-arm may be removed by simply tilting its outermost end, thereby bringing the toe j out of the recess j and permitting the entire arm to be drawn away from the shaft in a horizontal direction and another arm to be reintroduced and put in place, when the operation may be resumed. This, it will be obvious, is a great saving of time and labor.

It will also be obvious that by my method of building the roasting floors or trays the labor of supporting the floors by arches and the expense of making special supports for the tiles that was heretofore deemed necessary are obviated.

It will likewise be obvious that the details of construction may be varied without departing from the spirit of my invention.

\Vhat I claim, and desire to secure by Letters Patent, is,-

1. In a roasting-furnace, the combination with the main shaft having a hub and having said hub provided with upwardly-projecting lips j side wings 3' and with an overhanging flange 7' of stirrer-arms K K having stirrer pins or teeth 70, said stirrer-arms being also provided with the up'wardly-projecting toe and with the laterally-projecting pins f, all arranged so that when the parts are assembled the pins j rest on the lipsj", the toe entering beneath the fiangej, and so that one or more of the teeth 7t on the stirrer-arm are nearer the center of the shaft than the pins j 2. The herein-described roasting apparatus consisting of one or more roasting-floors combined with a vertical main shaft running through the floors, the said shaft having a plurality of hubs, each hub provided with upwardly-projecting lips 7' side wings j and .with an overhanging flange f, of a stirrer-arm entered into each hub, each stirrer-arm having stirrer pins or teeth 7t, said stirrer-arms also provided with an upwardly-projecting toe 7' and with laterally-projecting pins f. all arranged so that when the parts are assembled the pins j will rest on the lips j and the toej will enter between the flange j, so that one or more of the teeth on the stirrer-arms are nearer the center of the shaft than the pins 3' and the stirrer will be in position to stir material placed upon the roasting-floor, substantially as described.

JOHN ll. FRAMIIS llllRltESllOl lz.

Witnesses:

HARRY M. TURK, GEORGE E. MORSE. 

